Distech Controls ECL/ECB-PTU Series User Manual page 115

Table 29: STATUS LED Interpretation for Normal Operation with ECB Devices
Device STATUS LED Status
blink patterns
The STATUS LED is No anomaly
always ON (ECB PTU
Series only)
Table 30: STATUS LED Fault Condition Interpretation for ECB Devices
Device STATUS LED Possible Cause
blink patterns -
every 2 seconds
(highest priority
shown first)
Long Long Long blink Offline
(800ms On, 300ms
Off, 800ms On, 300ms
Off, 800ms On)
Short Short Long blink Poor-quality power.
The device has
browned-out (for 24V
(150ms On, 300ms
controllers)
Off, 150ms On, 300ms
Off, 800 ms On)
Short Long blink Invalid MAC address
(150ms On, 300ms
Off)
Table 31: Verify that the Following Recommendations have been Carried Out Before Calling Technical Support
Recommendation
Properly terminate the BACnet MS/
TP data bus
Avoid duplicate MAC Addresses
All devices must be set to the same
baud rate
Network Guide
Corrective Action
The device has not received a BACnet token, and therefore cannot communicate
on the network: Verify that the controller's MAC Address is unique on the BACnet
MS/TP Data Bus - see
troller's baud rate is the same as the BACnet MS/TP Data Bus' baud rate (see
Maximum Number of BACnet MS/TP Devices on a Data Bus Segment and Baud
Rate on page 14). Verify that the Max Master is set high enough to include this
controller's MAC Address (see
page 34).
The voltage at the 24VAC/DC and 24VCOM terminals was not at an acceptable
level during power up.
The device's MAC address is set to zero (0) or is set to an address higher than
the Max Master. See
32.
Description
EOL terminations must be enabled / installed at either end of the data bus only. See
71.
Verify that no device has a duplicate MAC Address by checking the MAC Address DIP switch
settings on all devices on the data bus, including segments connected by a repeater.
If necessary, isolate devices from the data bus to narrow-down the number of devices that
may be at fault.
When all devices are set to AUTO baud rate, at least one device must be set to a baud rate,
usually the data bus master. See
Bus Segment and Baud Rate on page 148.
BACnet Troubleshooting
Description
Normal operation.
About the MAC Address on page 31. Make sure the con-
Setting the Max Master and Max Info Frames
BACnet MS/TP Data Bus Token-Passing Overview
Maximum Number of BACnet MS/TP Devices on a Data
on
on page
Figure
113